Comments on: Using Application Badges

By: James Heriot

James Heriot — Thu, 13 Oct 2011 18:42:23 +0000

To use the a zero or a negative number, would you be able to use for example x=(0) or x=(-9) with the parentheses keeping it from actually being a true zero or negative number. Just a thought.

By: Keith

Keith — Wed, 04 May 2011 14:41:41 +0000

You can schedule that you get an update using UILocalNotification. The class reference discusses the options for it, but basically you can schedule when your app receives a message. This posting is also very helpful: http://stackoverflow.com/questions/5375355/clear-app-badge-with-local-notifications

By: John Muchow

John Muchow — Mon, 18 Oct 2010 02:11:17 +0000

John, you will need to look into the multi-tasking API’s to manage this, by default once something is put into the background, it is essentially paused.

By: John

John — Fri, 15 Oct 2010 08:26:27 +0000

Hi,

How do you update the badge when your app is inactive? I want my app to check msgs and update the badge but once I close the app, the timer stops.
Thanks.

By: Tom H

Tom H — Sat, 08 May 2010 18:24:08 +0000

Hey Nick,

You could achieve that by positioning a custom UIView with badge image and label over the segmented control or use the method setImage:forSegmentAtIndex: to set a custom image as the segments content. You could create the segment content as a custom UIView then render it as an image (checkout http://pastie.org/244916) then set that as the segment image. Maybe create a UIView subclass with a method that takes a comment number and returns a UIImage to set as the segment control content when the comment count changes?

By: Nick Smith

Nick Smith — Tue, 27 Apr 2010 16:50:26 +0000

Is it possible to use badges on a segmented control? We’re working on an app where one of the buttons opens a comments pane. I’d like to use a badge to display a count of new comments since last viewed. I’ve been told this isn’t possible.

By: John Muchow

John Muchow — Tue, 16 Feb 2010 14:53:49 +0000

Hi Bjørn,

Unfortunately, it looks like zero or any negative value removes the badge from the display.

By: Bjørn Tennøe

Bjørn Tennøe — Tue, 16 Feb 2010 08:55:19 +0000

Hi, can you show negative number? That way, temperature could be shown (for an online weather app)

By: John

John — Thu, 26 Feb 2009 04:52:54 +0000

Hi Doug,

You should be able to pass in any variable of type NSInteger.

NSInteger x = 99;
[[UIApplication sharedApplication] setApplicationIconBadgeNumber:x];

John

By: Doug

Doug — Thu, 26 Feb 2009 04:15:02 +0000

Hey John,

As someone who is new xcode thow would I pass a variable to the App Badge?

Thanks, Doug